Self-Diagnosis Function - LG ARUN050LMC0 Installation Manual

26

Self-Diagnosis Function

Error Indicator
- This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
- Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outside unit control board as shown
in the table.
- If more than two troubles occur simultaneously, lower number of error code is first displayed.
- After error occurrence, if error is released, error LED is also released simultaneously.
Error Display
1st,2nd,3rd LED of 7-segment indicates error number, 4th LED indicates unit number.
Ex)
Repeat
Error No. of Unit
Error No. of Compressor
Error No.
* Refer to the Indoor manual for some Indoor Error code.
Display
0 1 - Air temperature sensor of indoor unit
0 2 - Inlet pipe temperature sensor of indoor unit
Communication error : wired remote controller ↔
0 3 -
indoor unit
0 4 - Drain pump
0 5 - Communication error : outside unit ↔ indoor unit
0 6 - Outlet pipe temperature sensor of indoor unit
0 9 - Indoor EEPROM Error
1 0 - Poor fan motor operation
2 1 1 Outdoor Unit Inverter Compressor IPM Fault
Inverter Board Input Over Current(RMS) of Outdoor
2 2 1
Unit
2 3 1 Outdoor Unit Inverter Compressor DC link Low Voltage
2 4 1 Outdoor Unit High Pressure Switch
2 5 1 Outdoor Unit Input Voltage High/ Low Voltage
2 6 1 Outdoor Unit Inverter Compressor Start Failure
2 9 1 Outdoor Unit Inverter Compressor Over Current
Outdoor Unit Inverter Compressor1 High Discharge
3 2 1
Temperature
3 4 1 High Pressure of Outdoor Unit
3 5 1 Low Pressure of Outdoor Unit
3 6 1 Outdoor Unit Low Compression Ratio Limited
4 0 1 Outdoor Unit Inverter Compressor CT Sensor Fault
Outdoor Unit Inverter Compressor1 Discharge
4 1 1
Temperature Sensor Fault
4 2 1 Outdoor Unit Low Pressure Sensor Fault
4 3 1 Outdoor Unit High Pressure Sensor Fault
4 4 1 Outdoor Unit Air Temperature Sensor Fault
Outdoor Unit Heat Exchanger Temperature Sensor
4 5 1
(Front side) Fault
4 6 1 Outdoor Unit Suction Temperature Sensor Fault
Title
www.lgcomfortcooling.co.uk
Cause of Error
Air temperature sensor of indoor unit is open or short
Inlet pipe temperature sensor of indoor unit is open or short
Failing to receive wired remote controller signal in indoor unit PCB
Malfunction of drain pump
Failing to receive outside unit signal in indoor unit PCB
Outlet pipe temperature sensor of indoor unit is open or short
In case when the serial number marked on EEPROM of Indoor unit is 0 or
FFFFFF
Disconnecting the fan motor connector/Failure of indoor fan motor lock
Outdoor Unit Inverter Compressor Drive IPM Fault
Outdoor Unit Inverter Board Input Current excess (RMS)
DC charging is not performed at Outdoor Unit after starting relay turn on.
System is turned off by Outdoor Unit high pressure switch.
Outdoor Unit input voltage is over 487V or below 270V
The First Start Failure by Outdoor Unit Inverter Compressor Abnormality
Outdoor Unit Inverter Compressor Fault OR Drive Fault
Outdoor Unit Inverter Compressor1 High Discharge Temperature
High Pressure of Outdoor Unit
Low Pressure of Outdoor Unit
Outdoor Unit Low Compression Ratio Limited
Outdoor Unit Inverter Compressor CT Sensor open or short
Outdoor Unit Inverter Compressor Discharge Temperature Sensor open or
short
Outdoor Unit Low Pressure Sensor open or short
Outdoor Unit High Pressure Sensor open or short
Outdoor Unit Air Temperature Sensor open or short
Outdoor Unit Heat Exchanger Temperature Sensor(Front side) open or
short
Outdoor Unit Suction Temperature Sensor open or short